"Please verify that you have enough Crystal licenses"

The error message "Please verify that you have enough Crystal licenses" is really awfull. This is some kind of general crystal error and probably does not have anything to do with licenses!

I've had this myself and with me a lot of other people on the newsgroups. If you are experiencing the same, then you should take a look at the following kb articles. There are 12 possible resolutions for this error which are described in these KB articles:
- 875086
- 862678.

You can access them via https://mbs.microsoft.com/knowledgebase/search.aspx or https://premier.microsoft.com

In case you cannot access these, they are also available via newsgroup postings:

875086
862678

Time for Crystal to be replaced by SQL Reporting Services :)

Update:
For researching purposes, you should try to open this file in IE: http://crmserver/Reports/crystallogon.csp.
You should see something like:


If there is a message regarding the MSCRMuser which cannot be found, then try to rebuild the Crystal APS database (kb 862678, see above).